JP4108711B2 - Tube pump - Google Patents

Description

  The present invention relates to a tube pump that performs a pumping action by compressing a tube arranged in a ring shape along an inner peripheral surface of a cylindrical chamber in one direction by a ring-shaped pressurizing member that is arranged on the inner side and moves eccentrically. .

  This type of tube pump is susceptible to damage due to its structure, so maintenance work such as inspection and replacement of the tube is required. However, the ring-shaped part of the tube is narrow between the pressurizing member and the cylindrical chamber circumferential surface. Since it is located in the space and part of it is in a compressed state, it is not easy to reliably check even if the cover plate attached to the opening of the cylindrical chamber is removed. It takes a lot of time to work.

Thus, a cylindrical chamber is constituted by a pair of opening and closing pieces shaped so as to sandwich the pressure member from both sides, and the opening and closing pieces are opened so that the tube can be exchanged in a state where the ring-shaped portion of the tube is not compressed. The following patent document 1 proposed. However, the device described in this document has a problem that the structure of the housing is complicated and the manufacturing cost increases.
JP 2000-227076 A

  This invention pays attention to these points, and it is an object of the present invention to provide a tube pump that has a relatively simple structure, is inexpensive to manufacture, and that allows easy inspection and replacement of tubes.

  In order to achieve the above object, in the tube pump according to the present invention, at least a portion constituting the cylindrical chamber is formed of an elastic material, and a holding member that is in contact with the outer peripheral portion of the cylindrical chamber and prevents deformation of the cylindrical chamber. The housing is comprised with the cover plate which consists of a hard material provided with the part.

  The cylindrical chamber is formed integrally with the substrate, for example, by projecting a cylindrical convex portion from the substrate.

Further, a tube unit is configured by a ring-shaped portion of a tube arranged along the inner peripheral surface of the cylindrical chamber and a drawer portion and a drawer portion connected to the tube-shaped portion, or a holder provided in the vicinity thereof. The tube unit is mounted between the cylindrical chamber and the pressure member, and the tube unit is mounted on the housing body by holding the holder with an attachment portion provided on the housing body.

In addition to the cylindrical chamber, the housing body has a mounting portion integrally projecting from the substrate, and the cover plate has a concave pressing portion corresponding to the cylindrical chamber and a concave portion corresponding to the mounting portion. Yes.

  Further, the pressure member is configured to be detached from the housing body with the cover plate removed from the housing body, and the ring-shaped portion of the tube is pushed into the cylindrical chamber of the housing body in a state where the pressure member and the tube unit are combined. I am doing so.

  According to this invention, since the cylindrical chamber portion of the housing body is formed of an elastic material, the cylindrical chamber can be deformed with the cover plate removed. For this reason, even if the tube is compressed by the pressure member, the tube can be removed and inserted relatively easily by deforming the cylindrical chamber outward to ease the compressed state. It becomes easy to attach and detach. In particular, in the case where the cylindrical chamber is formed on the inner surface of the cylindrical convex portion, the cylindrical chamber can be easily deformed by appropriately selecting the thickness and cross-sectional shape of the cylindrical convex portion.

  In addition, in the case where the tube unit is configured by integrating the ring-shaped portion, the drawer portion, and the holder, the tube unit can be easily attached and detached, and the tube can be inspected and replaced efficiently.

In addition to the cylindrical chamber, a housing body formed by protruding the mounting portion from the substrate, and a cover plate formed with a concave pressing portion corresponding to the cylindrical chamber and a concave portion corresponding to the mounting portion are combined. The tube body can be held and the cylindrical chamber can be reliably prevented from being deformed by covering the housing body on which the tube unit is mounted with a cover plate and fixing them together.

  In the case where the pressure plate is removed from the housing body so that the pressure member can be detached from the housing body, and the pressure member and the tube unit are combined and pushed into the cylindrical chamber, the ring of the pressure member and the tube Compared to the case where the tube is pushed in while expanding the gap of the part that is in contact with the inner peripheral surface of the cylindrical chamber while the pressure member is attached to the housing main body Becomes easy.

  Examples of the present invention will be described below. 1 is a front view of the housing main body with the cover plate removed and a tube attached, FIG. 2 is a front view of the tube unit, FIG. 3 is a front view of the housing main body with the tube unit removed, and FIG. FIG. 5 is an exploded side view with a part broken away.

  In the figure, A is a housing, which is composed of a housing body 1 and a lid plate 2 attached to and detached from the housing body 1. 3 is a cylindrical chamber, the inside of the cylindrical convex part 3a which protruded and formed from the board | substrate 1a of the housing main body 1 is the cylindrical chamber 3, and the circular inner peripheral surface 3b is a part of cylindrical convex part 3a. By lacking, it is formed in a range that is larger than the semicircular circumference and smaller than the entire circumference, and the portion where the inner peripheral surface 3b is not formed is an input / output portion 3c. On both sides of the input / output part 3c, mounting parts 1b for holding a holder of a tube unit, which will be described later, are formed integrally protruding from the substrate 1a. Reference numeral 1c denotes a nut embedded in the substrate 1a, and a metal back plate 1d is attached to the back surface of the substrate 1a by screwing using the nut 1c. Such a housing body 1 is integrally formed as a whole by molding an elastic material, and an elastic material having a hardness of around 70 °, such as NBR, is used. Depending on the structure of the pump, not the entire housing body 1 but the cylindrical chamber 3 may be made of an elastic material and integrated with the substrate 1a.

  The cover plate 2 is a molded product of hard plastic such as acrylic, polypropylene, polyacetal, for example, and has a concave pressing portion 2a having a size and shape corresponding to the outer peripheral portion of the cylindrical chamber 3, that is, the outer side of the cylindrical convex portion 3a. And a recess 2b corresponding to the mounting portion 1b. 2c is an attachment hole formed corresponding to the nut 1c of the housing body 1, and the cover plate 2 is put on the housing body 1 and fixed to the housing body 1 using a nut 1c and a screw (not shown). A closed housing A is constructed. Reference numeral 2 d denotes an opening formed corresponding to the input / output part 3 c provided in the housing body 1.

  4 is a tube comprising a ring-shaped portion 4a arranged along the inner peripheral surface 3b of the cylindrical chamber 3 and a leading portion 4b at both ends connected to the ring-shaped portion 4b. A relay pipe 4c is connected to the leading portion 4b, A holder 4d is fixed to the relay pipe 4c to constitute a tube unit 4e as a whole. Depending on the structure, the holder 4d may be provided in the drawer 4b. The tube 4 is comprised from elastic materials, such as a rubber-type material and a synthetic resin, and is equipped with moderate elasticity and shape retention force. A mounting groove 1e is formed in the mounting portion 1b of the housing body 1a. When the tube unit 4e is mounted on the housing body 1, the holder 4d is held by being fitted into the mounting groove 1e.

  Reference numeral 5 denotes a ring-shaped pressurizing member arranged inside the tube 4, which is composed of an inner ring 5 a made of hard plastic and an outer ring 5 b made of an elastic material such as rubber fitted on the outer periphery thereof. The mutual fitting is maintained by the groove on the inner periphery of the ring 5a and the protrusion on the outer periphery of the outer ring 5b. A flange portion 5c is formed on the outer peripheral edge on the cover plate side of the outer ring 5b.

  Reference numeral 6 denotes an eccentric rotor disposed inside the pressurizing member 5, and 7 denotes a rotating shaft to which the eccentric rotor 6 is attached. The outer peripheral surface of the eccentric rotor 6 is the inner peripheral surface of the inner ring 5 a of the pressurizing member 5. The pressurizing member 5 is configured to be eccentrically moved along the inner peripheral surface 3 b of the cylindrical chamber 3. The pressure member 5 simply fits into the eccentric rotor 6, and can be easily removed from the eccentric rotor 6 when the cover plate 2 is removed from the housing body 1. 2e is a roller bearing provided on the cover plate 2 to support the tip of the rotary shaft 7. Reference numeral 8 denotes a motor with a speed reducer for driving the rotary shaft 7, which is attached to the back plate 1d. FIG. 1 shows a state in which the pressure member 5 is eccentric to the left side, the left side of the ring-shaped portion 4a is compressed, and the right side is not compressed.

  The illustrated embodiment has such a configuration, and when the tube unit 4e is mounted, the pressure member 5 is first put inside the ring-shaped portion 4a as shown in FIG. 5, the ring-shaped portion 4a and the pressure member 5 are pushed together into the cylindrical chamber 3, and the holder 4d is inserted and held in the mounting groove 1e formed in the mounting portion 1b of the housing body 1. This pushing into the cylindrical chamber 3 can be easily performed because the housing main body 1 is made of an elastic material and deforms so that the cylindrical convex portion 3a spreads outward. Further, since the pressure member 5 can be pushed together with the ring-shaped portion 4a, the pressure member remains attached to the housing body, and a part of the pressure member 5 is in contact with the inner peripheral surface of the cylindrical chamber. Compared with the case where only a tube that is difficult to transmit is pushed in, the pushing operation becomes much easier. In addition, since the pressing member 5 is provided with the flange portion 5c, the pressing force is well transmitted to the ring-shaped portion 4a, and the pressing operation is easy to perform from this point.

  During this pushing operation, the inner ring 5a of the pressure member 5 may be fitted to the outer ring 5b, but the inner ring 5a is removed as shown in FIG. Since it can be mounted in a state where there is no compression action, the pushing operation is further facilitated. In this case, the inner ring 5a is fitted between the outer ring 5b and the eccentric rotor 6 after the tube unit 4e and the outer ring 5b are mounted. This operation is more than when the tube is pushed into the narrow gap. Is also easy.

  After the tube unit 4e is set in the housing body 1 in this way, the mounting of the tube is completed by covering the housing body 1 with the cover plate 2 and fixing it. In a state where the cover plate 2 is fixed to the housing body 1, the outer side of the cylindrical convex portion 3a is reliably pressed by the pressing portion 2a of the cover plate 2 and the deformation of the cylindrical chamber 3 is prevented, so that it functions as a tube pump. The tube unit 4e is also securely held in the housing A.

  When removing the tube unit 4e for inspection or replacement, first, the cover plate 2 is removed from the housing body 1, and the tube unit 4e is removed from the cylindrical chamber 3 together with the pressure member 5 while removing the holder 4d from the mounting groove 1e. Good and easy to remove.

  The present invention can be applied to tube pumps of various structures, and a tube pump that allows easy inspection and replacement of tubes can be obtained.

It is a front view of the housing main body in the state where the tube of one example of this invention was equipped. It is a front view of a tube unit. It is a front view of a housing body. It is a front view of a cover plate. It is the disassembled side view which fractured and showed a part.

Explanation of symbols

A Housing 1 Housing body 1a Substrate 1b Mounting portion 2 Cover plate 2a Pressing portion 2b Recessed portion 3 Cylindrical chamber 3a Tubular convex portion 3b Inner peripheral surface 4 Tube 4a Ring-shaped portion
4b Drawer 4d Holder 4e Tube unit
5 Pressure member 5a Inner ring 5b Outer ring

Claims (5)

The tube is arranged in a ring shape along the inner peripheral surface of the cylindrical chamber formed in the housing, and the pressure member provided on the inner side of the tube is moved eccentrically along the inner peripheral surface, so that the ring shape of the tube In the tube pump that sends the fluid in the tube by sequentially pressing the part in one direction,
A housing body in which at least a portion constituting the cylindrical chamber is formed of an elastic material, and a lid plate made of a hard material provided with a pressing portion that contacts the outer peripheral portion of the cylindrical chamber and prevents the cylindrical chamber from being deformed outward; A tube pump characterized by comprising a housing. The tube pump according to claim 1, wherein the cylindrical chamber is formed integrally with the substrate by projecting the cylindrical convex portion from the substrate. A tube unit is composed of a ring-shaped portion of a tube arranged along the inner peripheral surface of the cylindrical chamber and a drawer portion and a drawer portion connected to the tube-shaped portion, or a holder provided in the vicinity thereof. The tube pump according to claim 2, wherein the tube pump is arranged between the cylindrical chamber and the pressurizing member, and the tube unit is mounted on the housing main body by holding the holder with an attaching portion provided on the housing main body. The mounting portion is formed so as to protrude from the substrate of the housing body, the cover plate to the claim 3, wherein the concave pressing portions corresponding to the recess and the cylindrical projections corresponding to the mounting portion is formed Tube pump. The pressure member is configured to be detached from the housing body with the cover plate removed from the housing body, and the ring-shaped portion of the tube is pushed into the cylindrical chamber of the housing body when the pressure member and the tube unit are combined. The tube pump according to any one of claims 1 to 4, wherein the tube pump is configured.

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